On 10/6/2011 12:22 PM, Joseph Mays wrote:
It feels strange to be asking a question about something as simple as a subnet 
here, but I'm honestly not sure what's going on in this case. Probably 
something simple.

As you can see from the following set of commands, the router is fine with 
breaking the following addresses up into /30's, but not fine with the aggregate 
of the two routes into a /29.

gw1.armplc(config)#ip route 216.24.2.4 255.255.255.252 216.24.0.54
gw1.armplc(config)#no ip route 216.24.2.4 255.255.255.252 216.24.0.54
gw1.armplc(config)#ip route 216.24.2.8 255.255.255.252 216.24.0.54
gw1.armplc(config)#no ip route 216.24.2.8 255.255.255.252 216.24.0.54
gw1.armplc(config)#ip route 216.24.2.4 255.255.255.248 216.24.0.54
%Inconsistent address and mask

A /29 (.248) has to start on a multiple of 8, so x.x.x.4 255.255.255.248 won't work.

--
Jerry Bacon
Senior Network Engineer

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